Impedance Track™ Technology Enabled Battery Management Solution Reference Design


Design files


This reference design is designed for the bq20z65/bq29412 battery management system. It includes one bq20z65/bq29412 circuit module and a link to Windows™-based PC software. The circuit module design includes one bq20z65 integrated circuit (IC), one bq29412 IC and all other onboard components necessary to monitor and predict capacity, perform cell balancing, monitor critical parameters, protect the cells from overcharge, over-discharge, short-circuit, and overcurrent in 2-, 3- or 4-series cell Li-ion or Li-polymer battery packs. The reference design connects directly across the cells in a battery. With the EV2400 interface board and software, the user can read the bq20z65 data registers, program the chipset for different pack configurations, log cycling data for further evaluation and evaluate the overall functionality of bq20z65/bq29412 under different charge and discharge conditions.

  • Number of series cells: 2 to 4S
  • Maximum input volts: 25 V
  • Maximum charge current: 3 A
  • Communication: SMBus
  • Impedence track, integrated protection
  • This reference design requires the use of a communications tranceiver; EV2400
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU112.PDF (1264 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDR082.PDF (110 K)

Detailed schematic diagram for design layout and components

TIDR085.PDF (126 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDU113.PDF (229 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Battery charger ICs

BQ24190I2C controlled 4.5A single cell USB / Adaptor charger

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report TIDA-00050 Test Results Aug. 27, 2013

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